tachometer wiring

help... i bought a dash mount tachometer and need help with the wiring i could figure it out myself but would like to save time... anyone else done one and knows whats up?

[GreenMarine]

Dude, you're on Ft. Benning?? I went out there to get something one time when I was visiting my friend... Cool... You have an SVX right??

i have red svx with black vinyl stripe on sides, exhaust

where did you get your engine grounding kit or did you make it?

heres a picture on my cardomain page http://members.cardomain.com/subaru_newbie

[rmjjensen]

I think u just need, power, ground, illumination and tach signal.

Power -> anywhere - ignition?
Ground -> a nice metal screw in the body
Illumination -> I think red/black in driver kick, or hit up red/black behind the parking light switch that's attached to the knee bolster panel.
Tach Signal -> Hit up the ECU - solid Yellow wire

[lee]

Originally posted by rmjjensen
I think u just need, power, ground, illumination and tach signal.

Power -> anywhere - ignition?
Ground -> a nice metal screw in the body
Illumination -> I think red/black in driver kick, or hit up red/black behind the parking light switch that's attached to the knee bolster panel.
Tach Signal -> Hit up the ECU - solid Yellow wire

I was always under the impression that by having individual coils this method wouldn't work - maybe live & learn time for me. BTW, my diagram (but not a FSM) shows a couple of yellow wires at the ECU for the 92 model.

Subaru_Newbie: Why do you want an add-on tach, isn't the one in the dash working - did any SVXs come without a tach (I thought they all had one)?

the tach works fine i just want one eiasier to see with a nice bright shift light... i will check the yellow wire on ecu... will the voltage jump up when revved up... be easy to find with multimeter... oh and i got a/f gauge... which of the 3 wires from the o2 sensors in sensor signal wire?

[rmjjensen]

Originally posted by lee


I was always under the impression that by having individual coils this method wouldn't work - maybe live & learn time for me. BTW, my diagram (but not a FSM) shows a couple of yellow wires at the ECU for the 92 model.

Pin 16 in a 16 Pin Plug ....or Pin 64 ...depends on year

ok heres all i need... the tach signal wire , and o2 sensor wire on ecu... oh and where is ecu... under dash on drivers side... sorry stupid question but im new to subaru... btw i have 1995 svx l awd

ok heres what i got... the power ground and illumination are not a problem for me... for either gauge... thats easy its the tach signal wire and o2 sensor signal wire... i downloaded wiring diagrams and got solid yellow wire on 16 pin connector as tach signal, and pin 6 on 22 pin connector solid white is 02 sensor wire... my question is where is the connectors... im assuming under the dash but its dark out and i will have to wait until tomorrow to make sure... any help would be appreciated

[rmjjensen]

Right under the steering column (driver dash) you will see the TCU and ECU ...you can't miss it ....the ECU plugs (4?) are the easy ones in your reach ....those are where u can find ur wires.

Originally posted by Subaru_Newbie
the tach works fine i just want one eiasier to see with a nice bright shift light... i will check the yellow wire on ecu... will the voltage jump up when revved up... be easy to find with multimeter... oh and i got a/f gauge... which of the 3 wires from the o2 sensors in sensor signal wire?

oh gosh

[rmjjensen]

did u do a five speed conversion? or you just plan on eating the 4EAT power shifting

eating the 4eat ... i wired up the a/f gauge to the wire i thought it was and all the led light stay on... so i guess i was wrong